Low-viscosity flowing type high-thermal-conductivity flame-retardant packaging material and preparation method thereof

Abstract

The invention discloses a low-viscosity flowing type high-thermal-conductivity flame-retardant packaging material and a preparation method thereof. The packaging material comprises the following components in parts by mass: 70-100 parts of alkoxy-terminated polysiloxane; 0-30 parts of dimethyl silicone oil; 400-700 parts of a functional filler; 0.5-10 parts of a surface treating agent; 1-10 parts of an anti-settling agent; 0.5-5 parts of a cross-linking agent; 0.5-3 parts of a flame retardant aid; 0.2-2.0 parts of an adhesion promoter; and 1.0-5.0 parts of catalyst. Meanwhile, the invention also provides the preparation method of the low-viscosity flow type high-thermal-conductivity flame-retardant packaging material. The packaging material has relatively low viscosity, good fluidity, a heat conductivity coefficient of 1.5 W / m.K or above and flame retardant property of UL94V0 level, and also has good adhesive property.

Description

technical field [0001] The invention relates to the field of silicone rubber, in particular to a low-viscosity flow type high thermal conductivity flame-retardant packaging material and a preparation method thereof. Background technique [0002] One-component thermally conductive adhesive packaging materials have been widely used in various fields such as aerospace, power equipment, power devices, automotive electronics, and military equipment. They play the role of thermally conductive adhesive and insulation protection, and are a good thermally conductive package Materials, with the increase in power handling of power devices and the trend toward smaller, higher-density electronic modules, the need for heat control is also increasing. At the same time, the structural design of these power devices and electronic modules is becoming more and more Diversification, more and more applications usually require thermally conductive adhesives to have better fluidity to meet the hea...

AI Technical Summary

Problems solved by technology

[0003] One-component flame retardant and thermally conductive packaging materials need to obtain high thermal conductivity and excellent flame retardant performance, usually need to add a large amount of thermally conductive and flame retardant fillers, which will lead to The consistency of the glue is high, the manufacturability is poor, and it does not have any fluidity. In addition, the filling of a large amount of fillers will also make the adhesive performance of the glue poor; while the filling of low fillers can make the glue fluid, but It will also lead to the problem that the thermal conductivity of the glue is greatly reduced and the flame retardant performance is deteriorated.

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